The phrase "as a vault" is correct and usable in written English.
It can be used in contexts where you want to describe something that serves as a secure or protective space, similar to a vault.
Example: "The old library served as a vault for the town's historical documents, preserving them for future generations."
Alternatives: "like a safe" or "as a repository".
The Pakistanis have sealed Torkham tight as a vault.
For decades the space was used as a vault to store part of the museum's American silver collection.
Then I went to work for Kidder Peabody, the Wall Street firm, as a vault manager, but eight years later, in 1987, I was ready for a change.
Ms. Perez's husband, Jorge Ortiz, works two jobs, one restocking shelves at Target, another as a vault technician for an armored-truck company.
Annia Hatch, on the team as a vault specialist, could not deliver in her one and only event, with a combined score of 9.418 after two shaky landings.
Data Islandia, a local company, is trying to establish the island as a vault for a growing pile of data that firms must retain in order to comply with all kinds of regulations.
Now Britain has become the first country to announce that its register would be open to the public.In this section The weak link Out of puff Mix and match ReprintsThe misuse of trusts, foundations and the like has drawn less interest though some view such vehicles as a vault-sized loophole.
The living room has a built-in desk and shelves, as well as a vaulted ceiling with an exposed truss system of crisscrossing fir beams.
Paul O'Neill waved futilely at an outside pitch by Mike Sirotka, as if he needed a bat as long as a vaulting pole to make contact.
Visitors descend a well of diffused light, down limestone steps, as if entering a vault.
Certain freedoms I once imagined as being in a vault somewhere, like ancient jewels kept safe from thieves.
